Re: [PLUG] Raising the dead: proc filesystem

Then do:

$ perl -MIO::Interface::Simple -e 'print IO::Interface::Simple->new("eth0")->address, "\n"'

Frank

On Jan 8, 2013, at 1:29 PM, Russ Thompson <vigornj@gmail.com> wrote:

I have the following setup on my server: http://vigeek.net/extip.php

Same scenario as what Fred suggested, just curl that URL.

On Tue, Jan 8, 2013 at 11:44 AM, Fred Stluka <fred@bristle.com> wrote:
Sam,

Try:
% curl http://automation.whatismyip.com/n09230945.asp

--Fred
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On 1/7/13 12:56 PM, Sam Gleske wrote:

Reference to an original thread "proc filesystem":
http://lists.netisland.net/archives/plug/plug-2002-12/msg00478.html

Has anyone found a decent way to do this outside of parsing ifconfig output? I've done it in a one liner here...
http://www.linuxquestions.org/questions/blog/sag47-492023/using-a-script-to-get-your-ip-address-35251/

Yet I've found that most times I'm able to reliably turn to the */proc* filesystem for stuff like this. I'm just curious if anyone has found a decent way to do this since that thread was originally posted.

I wonder if parsing a combination of */proc/net/fib_trie* and */proc/net/route* would be useful in finding the IP address of the default route (which I would assume be the internet connected IP address). I found fib_trie by grep -irl my IP address through /proc. Here's some kernel documentation on fib_trie but there's nothing useful about using it for obtaining the IP address of the default route.

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=blob;f=Documentation/networking/fib_trie.txt;h=0723db7f8495a1a0466ae06cd311c3e72ce24337;hb=HEAD

I look forward to discussing this.

SAM

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___________________________________________________________________________
Philadelphia Linux Users Group -- http://www.phillylinux.org
Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce
General Discussion -- http://lists.phillylinux.org/mailman/listinfo/plug

___________________________________________________________________________
Philadelphia Linux Users Group -- http://www.phillylinux.org
Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce
General Discussion -- http://lists.phillylinux.org/mailman/listinfo/plug